Evaporator.



E. W. HOLMES.

EVAPORATOR. APPLICATION FILED JULY 16, 1914.'

Patented Sept. 14, 1915.

TED @TAg FATENT FTQE.

EB'WIN W. HOLMES, OF J EFFERSONVILLE, VERMONT.

EVAPORATOR.

Application filed July 16, 1914.

To all whom it may concern:

Be it known that I, ERWIN W. HoLMns, a citizen of the United States, residing at Jeffersonville, in the county of Lamoille and State of Vermont, have invented certain new and useful Improvements in Evaporators, of which the following is a specification, reference being had therein to the accompanying drawing.

My invention relates to improvements in evaporator-s, and more particularly to those used in evaporating maple syrup.

The object of my invention is to provide an evaporator of the character in which the waste products of combustion are utilized in the initial heating or boiling of the sap.

Another object of my invention is to provide an evaporator in which the sap in the initial heating cannot boil over the pan and at the same time providing a simple, cheap and more effective evaporator having certain details of structure hereinafter more fully set forth.

In the accompanying drawingsFigure 1 is a perspective view of my improved evaporator. Fig. 2 is a longitudinal sectional view of Fig. 1. Fig. 3 is a transverse sectional view taken on the line 3-3 of Fig. 2. Fig. 4c is a side elevation, partly broken away, of the rear end of the evaporator looking from the opposite direction from that shown in Fig. 1. Fig. 5 is a top plan view partly broken away of the initial heating tank.

Referring now to the drawings, 1 repre-' sents the furnace of my improved evaporator which has at its forward end the usual grate 2 and fuel door 3, by means of which the furnace is fed with fuel and a lower door by means of which the ashes may be removed from the fire-box 5. The furnace is provided with a rearwardly inclined extension 6, which has its extreme rear end 7 inclined at a greater angle, aswill be hereinafter more fully described. The extension 6 forms a passage for the products of com bustion to pass rearwardly, thus enabling all of the heat therefrom to be utilized in the evaporation of the sap.

Resting upon the upper rear edge of the passage 6 in beyond the portion 7 is the initial heating tank 8. This tank has a reduced lower end extending within the portion 6 of the furnace and having its lower edge resting upon the bottom 9 of the said passage. This portion within the extension Specification of Letters Patent.

Patented Sept. 14., 1215.

Serial No. 851,356.

6 of the furnace is provided with fines 10, through which the products of combustion pass. This enables the sap to surround the lines to be thoroughly heated before it passes to the main evaporator pan 11. One end of the tank 8 is provided with a receptacle 12, which is divided vertically by a partition 13 and the horizontal partition 14, forming a pocket 15 into which the raw sap passes. Extending along the side of the tank 8 are two vertical partitions 16 and 17 which have at their lower ends the horizontal bot toms which are provided with openings 17 and by means of which the sap passes to the tank 8. The opposite ends of the space between the walls of the tank 8 and the verti cal partitions 16 and 17 have pipes 18 and 19 communicating therewith, which communicate with each other and have a common pipe 20 communicating with the receptacle 15, and whereby the sap is first fed in the space between the vertical partitions 16 and 17 and the wall of the tank 8 and passes out through the open rings 17. The partitions 16 and 17, as fully shown in Figs. 1 and 2,

of the drawings, do not extend up to the upper end of the tank for the purpose hereinafter more fully described. The receptacle 21 on the opposite side of the partition 13 is in communication with the tank 8, between the partitions 16 and 17, whereby the sap after being initially heated passes into the receptacle .21, as will be hereinafter more fully described.

Extending transversely of the evaporator and abutting the tank 8 is a shallow evaporator pan 22, and adjacent thereto and covering the remainder of the furnace of the evaporator is a large evaporating pan 23. This pan 23 covers the entire upper end of the furnace in front of the evaporating pan 22 and this causes all of the products of combustion to pass rearwardly through the passage 6 and the fines 10, where it is discharged from the space 7, as clearly shown in Fig. 2 of the drawings. The large evaporating pan 23 has a receptacle 24 at one side, which has an opening 25 communicating with the pan 23, and has in communication with its lower end a pipe 26, which leads rearwardly and communicates with the lower end of the receptacle 12, whereby the heated sap passes from the tank 8 to the main evaporating pan 23. This pan is provided with a number of partitions 27, which extend longitudinally thereof and each and every other partition is provided at opposite ends with cut-away portions 23. This causes the sap as it passes from the openings 25 into the evaporating pan to travel back and forth and is discharged through an opening 29 to a receptacle 30. This receptacle 30 has a pipe 31 communicating with its lower end and said pipe also communicates with the lower end of a receptacle 32 carried by the small evaporating pan 22. The receptacle 32 has an opening 33 communicating with a pan 22 and whereby the sap enters the receptacle 32. The small evapo rating pan 22 is provided with transverse partitions 34, which like the partitions 27 have cut-away portions 34 alternately arranged at opposite ends in order to cause the passage of the sap back and forth and is discharged through an opening 35 into a receptacle 36. The receptacle 36 has a pipe 37 leading therefrom whereby the evaporating sap which has become syrup is withdrawn from the evaporating pan 22.

As heretoforedescribed, the raw sap is fed to the tank 8 through the receptacle 15 and enters in the space between the partitions 16 and 17 and the outer walls of the tank. Should the sap boil in the tank 8 to any extent, it will boil over the partitions 16 and 17 and fall back into the space be tween the same and the walls of the tank and mingle with the cold sap that is being fed to the tank 8 and thus will not boil over the sides of the tank, but at the same time will be conveyed back into the tank to be again heated or boiled, as fully understood by those skilled in the art and needs no further description. I

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. An evaporator of the character described, comprising a fire-box having a rearwardly extending inclined flue, an evaporator pan above the fire-box, a tank extending within the inclined rearwardly extending portion of the fire-box and having flues through which the products of combustion pass from the fire-box, passages within the tank adjacent each side and of a height less than that of the tank, means for supplying the raw sap to the said passages, and means for conveying the sap from the tank to the evaporator pan.

2. An evaporator of the character described, comprising a fire-box, a tank above the fire-box, fines passing through the tank and through which the products of combustion pass from the fire-box, vertically disposed passages carried by the inner face of the opposite sides of the tank and of a height less than that of the tank and having outer open ends, and means for supplying the raw sap to the opposite ends of the passages, substantially as shown and described.

-and described.

3. An evaporator of the character decombustion pass from the fire-box, vertically disposed passages at the opposite sides of the tank and of a height less than that of the tank and having their ends at one end of the tank open, means for supplying the raw sap to the opposite ends of the passages, and means for withdrawingthe heated sap from the tank. V j

4:. An evaporator of the character described, comprising a fire-box having a rearwardly and upwardly inclined flue, an evaporator pan above the fire-box adjacent its forward end and having vertical partitions adapted to cause the sap to flow back and forth through the same, a second evaporator pan in rear of thefirst pan and having like partitions, a tank supported upon the upper end of the rearwardly inclined portion of the fire-box and having a portion extending Within the same, horizontally arranged fiues extending through the tank intermediate its upper and lower ends, vertically disposed passages at opposite sides of the tank and of a height less than that of the tank above the fiues and having their ends open adjacent one end of the tank, means for supplying sap to the passages at the opposite ends, means for conveying sap from the tank to the forward evaporating pan, and means for conveying the sap from the opposite side of the said forward evaporator pan and con veying itinto the intermediate evaporator pan. I

5. An evaporator of the character described, comprising a fire-box having an upwardly inclined rear end, an evaporating pan above the fire-box and having zigzag passages extending longitudinally of the fire-box, an evaporator pan inrear of the first-mentioned pan and having zigzag passages extending transverse the fire-box, a tank resting upon the upper end of the firebox and having a downwardly extending portion within the inclined rear end of the fire-box and engaging the lower face thereof, fines extending through the tank intermediate its upper and lower edges, vertically disposed passages within the tank adj acent each side and having their ends open adjacent one end of the tank, means for conveying the sap to the closed ends of the said passages, means for supplying the sap from the tank to one side of the forward evaporator pan, means for withdrawing the sap from the opposite side of the said evaporator pan and discharge it into the intermediate evaporator pan adjacent the forward end and means for discharging the sap from the said intermediate pan adjacent its rear edge on the opposite sidesubstantially as shown 6. An evaporator pan of the character de scribed, comprising a fire-box, a tank above the fire-box, vertically disposed passages carried by the inner face at the opposite sides of the tank and of a height less than that of the tank and having outer open ends, and means for supplying the raw sap to the opposite ends of the passages, substantially as shown and described.

7. An evaporator pan of the character described, comprising a fire-box, a tank above the fire-box, vertically disposed passages at the opposite sides of the tank and of a height less than that of the tank and having their ends at one end of the tank open, means for supplying the raw sap to the opposite ends of the passages, and means for withdrawing the heated sap from the tank.

8. An evaporator of the character clescribed, comprising a fire-box, an evaporator pan above the fire-box and having vertical partitions adapted to cause the sap to flow back and forth through the same, a second evaporator pan in rear of the first pan and having like partitions, a tank supported upon the rear end of the fire-box, vertically disposed passages at opposite sides of the tank and of a height less than that of the tank and having their ends opened adjacent one end of the tank, means for supplying sap to the passages at the opposite ends, means for conveying sap from the tank to the forward evaporator pan and means for conveying the sap from the opposite side of the said forward evaporator pan and conveying it into the intermediate evaporator pan.

9. An evaporator pan of the character described, comprising a fire-box, a tank above the fire-box, vertically disposed passages carried by the inner face of the opposite sides of the tank and of a height less than that of the tank and having outer open ends, and means for supplying the raw sap to the opposite ends of the passages, substantially as shown and described.

10. An evaporator of the character de scribed comprising a fire-box, a tank above the fire-box, vertically disposed passages at the opposite sides of the tank and of a height less than that of the tank, and having their ends at one end of the tank open, means for supplying the raw sap to the opposite ends of the passages, and means for withdrawing the heated sap from the tank.

In testimony whereof I hereunto aiiiX my signature in the presence of two witnesses.

ERWIN 4V. HOLMES.

WVitnesses:

ELsm C. SMITH, F. E. SMITH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

